Motor-tractor.



F. DE MARCO. MOTC' TRACTOR. APPLICATION FILED Aus la. 1917.

Patented Feb. 19, 1918.

wherein like characters of reference are` UNITED STATES PATENT oEEioE.

FRANK DE MARCO, 0F NEW YORK, N. Y.

MOTOR-TRACTOR.

-tion engine for hauling loads along arailway or roadway, or as a stat'ionary'engine for general power work; and the object of the invention is to provide means for readily adapting the motor for the double. use, and also. to utilize the power thereof to effect the adjustment of parts of the mecln anism required for such 'variable use. The invention further includes certain details of construction and arrangement of parts hereinafter set forth.

In'describing the invention in detail, reference is had to the accompanying drawings, foi-ming a part oli' this specification, and

used to designate corresponding parts throughout the vSeveral views, and in which:

Figure 1 is a side elevation of a motortractor arranged to run upon a railway and provided with the improvement embodied in the present invention; Fig. 2, a ground plan of a portion of the body of the tractor, show.- ing the rear driving axle and connected gearing; Fig. 3 a reduced side elevation of the motor-tractor,sliown as operating as astationary hoisting engine for elevating a load- A ed car;- and Fig. 4 is an enlarged detail view tion.

'of tbe'twopart .rear anic of the tractor,

showing the differ- :ntialvor balanced driving gear and connected housing partially in sec- In the drawings.I numeral 1 designates the body or frame of the tractor, 2, thc front.` vWheels thereof, and 3 and 4, the housings of the motor and transmission gearing respectively, the m'otor and transmission being of common type, provided with the usual operating means, including in part the levers 5. Extending rearwirdly from the transmission case, is the drive shaft', arranged and connected up in well-known manner for differentially' driving the two-part rear axle 7, the latter being. rovided` at their adjacent inher enids. with tac usual balanced gearing,

Specification of Letters Patent.

Patented Feb. 19, 1918.

appneauun aieamgust 1s, 1917. serial No. 136,963.

as clearly shown in Fig. 4 and at their outer ends with a pair of fast traction wheels 8 and 9.

The body of the vehicle is supported upa-.fj

jacksshaft at one side .of the -clutch membery for engi'igemei'it with the latter, is a driving gear l5, andat the opposite side of the clutch .member for corresponding engagement therewith is a cam 1G, also loosely mounted on the j ackshaft, the lateral position of said loosely mounted gear and cam being maintained up'on the j ack-shaft by the usual collars, not shown.

vThe body of the vehicle is also provided with a bracket bearing 17, in which is liingedly mounted a stub-shaft 18, to the outer end of which is fixed an arm 19 and upon the inner end a lever 20, the latter provided at its free end with a roller Q1, ar'-` ranged for engagement by the cam 1G.V 'To the free cnr] of the arm 19`is hingedly connected a vertically depending jack-bar 22, loosely guided at' its lower end by the socket 23 formed on the extension 24 of the bracket bearing 17,. As thus connected, the jack-bar is adapted to receive vertical movement, its

movement of the .jack-bar is .accomplishedagainst the action of the ringand through the arm 19, stub-shaft 18, ever 2O and roller 21 by the rotation of the cam 16, which latter :in its working movement causes the lower end of the jack-bar to engage the track or ground-surface and in. reaction therewith to elevate or jack upa portion of. the body of the car together with its adjacent wheel 9, for the release-of the tractive force of the latter, and the free'rotation ofthe connectedpart and Vas shown in Fig. 3, the wheels of the car-- are cliocked to prevent the latters move# ment, and the cam 1G is engaged b v the clutch member 413 byl means of the shifterhandle l14. The motor is-then started and the power therefrom is transmitted through the drive shaft 6 and rear axle 7, causing the traction wheels to temporarily slip upon the tracks while the ower from the rear axle is transmitted t rough the gears 12 and 11 Afor the rotation of the cam `16 and 4the consequent depression .of the jack-bar 22 and the release ofV the traction wheel 9 for the free rotation thereof. As thus positioned, the clutch member is then withdrawn from the cam, allowing the llatter to remain at rest while the jack-shaft 10 continues itsrotation and is vfree to be used for general power purposes by engaging the clutch member thereof with the driving gear 15, the Alatter engaging the larger gearV 26, fixed upon the power receiving shaft 27, journaled in the standards 28. As herein sl iown,. thepower receiving shaft is provided with a hoisting-drum 29, having a cable 30, attached to'a loaded' car/31 and arranged to elevate the latter up an inclined way, as from a mine, .to the tractorl level, wheredirect connection and transportation may be madeA by means of the tractor.v

' lVliile I have shown the power receiving shaft as being connected in driving relation with a hoisting-drum, it will be obvious that the saine may' be employed for: various power purposes. It will also be seen that the drivin arrangement maybe readily started anc stopped by means of the shifter'- ha'ndle 14, or from the operating levers of the motor itself, which latter also provides for reversing lthe direction of rotation of the entire mechanism.

I" rom the above it will be evident that the vmotor-tractor may be quickly 'converted to operate as a stationary engine with little or no manual labor, and in a similar inanner may be. changed back to a Atraction engine arrangement by simply shifting the handle 14 again to rotate the cam and lower the traction wheel 9 npo`n the track.'

lVhat I claim as my invention and desir to secure by Letters Patent, is:

1 'A motor-tractor comprising a vehicle provided with a power pl-ant, a two-part dif When it isV desired.

"rest, and a power receiving shaft in power recei-vin ably connected to said ferential driving axle therefor having trac tion wheels fast thereon, driving connee tions between said power plant and axle normally adapted to lpropel said vehicle in opposite directions, means forreleasiii the 'opposite directions, means carried by said vehicle and actuated b the power lant thereof forv releasing t e traction o one of said wheels te permit the rotation of its" traction Vof one of said' wheels topermit the rotation of its connected axlev part while the vehicle is at rest, and a power receiving shaft in driving connection with said rota- Y connected axle part while the vehicle is at driving connection with said rotatable axle art.

In a motor-tractor, thev combination with,.a [two-part differential driving axle having traction wheels fast thereon, of a from one of t eV parts of said axle, and

shaft geared to be rotated means for releasingthe-wheel traction of said geared axle part to permit theA rotation thereof While the vehicle is at rest.

4. In a motor-tractor, vthe combination with a. two-part differential driving axle 'having traction wheels fasttliereon, of a jack-shaft driven from one of said axle parts, a power receiving shaft, a detachable driving connection between said jack-sihat and power receiving' shaft, and means or releasing thewheel' traction 4 of said 1 geared axle 'part to. permit the rotation thereof 4while the vehicle is at rest.

5. In a' motor'tractor, the combination `A lwith a .two-part differential driving axle having traction-Wheels `fast thereon, of a ypower receiving shaft geared to be rotatedl from one of the parts ,of said axle, andv a jack operatively mounted upon said'traci tor and adapted to raise and lowersaid geared axle part for the respective releasev and rengagement of the tractive surface' of its connected wheel while-the opposite wheel is at rest. G. In a motor-tractor, the combination with a two-part differential driving axle having traction wheels fast thereon, 4of ,a Jack-bar operatively mounted' on said trac tor and adapted to exert a thrust in oppol -sition tothe ground surface to release the wheel traction' of one of said axle parts to permit the `rotation there'otwhile the vehicle is at rest, a jaclcshaft 4driven fromv sail rotatable axle part,` and' a camA detach- )ack-shaft and ar- 'LA vmotor-tractor compi-isinga vehicle 130 rovided with a power plant, a two-part diferential driving,1r axle therefor havlng traetion wheels fast thereon, driving connections between said power plant and axle 5v normally adapted to propel said vehicle in opposite directions, means for raising one of said wheels to permit the rotation of ts connected axle part while the opposite wheel is at rest, and a power receiving shaft in drivmg connection with said rotatable axle 10 part.

Signed at New York 1n the county of New York and State of New York this 14th day of August A. D. 1917.

FRANK 'DE MARCO. 

